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The air admission shutoff (AAV) is a pipes gadget that plays an important function in airing vent air into a drainage system. When unfavorable pressure happens while avoiding hazardous drain gases from escaping, it is designed to permit air to go into the system. This modern technology has changed modern plumbing, using a much more adaptable and less intrusive service to typical venting systems. Exactly how Does an Air Admittance Valve Work? An air admittance valve operates on the concept of negative pressur

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